“on-off valve”的概念、定义、翻译、参考文献-科学参考

单词	on-off valve
释义	on-off valve 双位阀
随便看	copper-aluminium welding rod copper-aluminum alloy copper amalgam copper amalgamating plate copper anode copper arc welding electrode copper arsenate copperas copper-asbestos copper-asbestos gasket copper-asbestos packing copper-asbestos ring copper ashes copper aventurine glass copper backing copper bar copper base alloy copper base firction material copper base matrix copper bearing copper-bearing copper-bearing alloy copper bearing steel copper belt copper-beryllium

科学参考收录了1248194条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。